I use "testify" Bart Simpson style.
“Testify!” has a looooong history going way back, notably in AAVE and in the pulpit of Black churches in the U.S. South, particularly so during powerful, participatory sermons.
Coincidentally, that Simpsons episode, “Faith Off”, aired just a few months after Rage Against the Machine released their 1999 album, The Battle of Los Angeles, featuring Zach de la Rocha screaming “TESTIFY!” in the eponymous song (later released as a standalone single). Which I guess means, in the pop culture era of… our lifetimes, this one will always remind me of Zach doing Zach as only Zach can do.